Stock-Based Compensation (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under 2006 Equity Plan	1,081,260
Common shares authorized under the 2006 Equity Plan	800,000
Unrecognized stock-based compensation expense related to unvested awards, amount	$ 1,500,000
Unrecognized stock-based compensation expense related to unvested awards, weighted-average period of recognition	1 year 7 months
Common shares issued under Board of Directors' compensation plan	$ (245,000)	$ (134,000)	$ 207,000
Allocated Share-based Compensation Expense	1,332,000	$ 1,843,000	2,111,000
Unrestricted Stock Granted to Employees		12,030
Stock-based compensation expense	1,332,000	$ 1,843,000	2,111,000
Treasury Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares issued under Board of Directors' compensation plan	$ (263,000)	(177,000)	221,000
Stock-based compensation expense		$ 298,000	$ 298,000